1 files changed, 2 insertions, 0 deletions

diff --git a/arch/x86/kernel/pci-nommu_64.c b/arch/x86/kernel/pci-nommu_64.c
index a4e8ccfae4cb..1da9cf9be3aa 100644
--- a/arch/x86/kernel/pci-nommu_64.c
+++ b/arch/x86/kernel/pci-nommu_64.c
@@ -32,6 +32,7 @@ nommu_map_single(struct device *hwdev, phys_addr_t paddr, size_t size,
         dma_addr_t bus = paddr;
         if (!check_addr("map_single", hwdev, bus, size))
                                 return bad_dma_address;
+        flush_write_buffers();
         return bus;
 }
 
@@ -64,6 +65,7 @@ static int nommu_map_sg(struct device *hwdev, struct scatterlist *sg,
                         return 0;
                 s->dma_length = s->length;
         }
+        flush_write_buffers();
         return nents;
 }